Genetic variation and evolutionary demography of Fenneropenaeus chinensis populations, as revealed by the analysis of mitochondrial control region sequences

Genetics and Molecular Biology

Xiao Yu Kong²  Yu Long Li¹  Wei Shi¹  Jie Kong¹ 

[1] ,Chinese Academy of Sciences South China Sea Institute of Oceanology of Marine Bio-Resource Sustainable UtilizationGuangzhou,China

关键词: Fenneropenaeus chinensis;    mtDNA;    isolation with migration (IM) coalescence;    historical demography;    population expansion;   

DOI  :  10.1590/S1415-47572010005000019

来源: SciELO

【 摘 要 】

Genetic variation and evolutionary demography of the shrimp Fenneropenaeus chinensis were investigated using sequence data of the complete mitochondrial control region (CR). Fragments of 993 bp of the CR were sequenced for 93 individuals from five localities over most of the species' range in the Yellow Sea and the Bohai Sea. There were 84 variable sites defining 68 haplotypes. Haplotype diversity levels were very high (0.95 ± 0.03-0.99 ± 0.02) in F. chinensis populations, whereas those of nucleotide diversity were moderate to low (0.66 ± 0.36%-0.84 ± 0.46%). Analysis of molecular variance and conventional population statistics (F ST) revealed no significant genetic structure throughout the range of F. chinensis. Mismatch distribution, estimates of population parameters and neutrality tests revealed that the significant fluctuations and shallow coalescence of mtDNA genealogies observed were coincident with estimated demographic parameters and neutrality tests, in implying important past-population size fluctuations or range expansion. Isolation with Migration (IM) coalescence results suggest that F. chinensis, distributed along the coasts of northern China and the Korean Peninsula (about 1000 km apart), diverged recently, the estimated time-split being 12,800 (7,400-18,600) years ago.

【 授权许可】

CC BY   
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